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need to understand about poe+ vs 24 passive poe

hello 

 

please educate me to understand the compasrison this two option passive and poe i have difrent brand ap with 12 volt power im bit scare to inject my ap, which one of these two option for the 12 volt requirements 24 PASSIVE or POE+?

 

thanks so much

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Re: need to understand about poe+ vs 24 passive poe

If you have a device that takes 12V power in, don't use 24V passive or POE+. The 24V passive will most likely destroy your device (the +24V power is always there across pins 4,5 and 7,8), and the POE+ will most likely not power your device at all (it needs special signaling over the cable before it applies power to the pins).

Use this adapter, or one like it, to adapt POE+ to a 12V power output for your device:

http://www.amazon.com/USG-Splitter-Power-Non-PoE-Cameras/dp/B00M5U4OFA
I did it my way .... Man Happy
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Re: need to understand about poe+ vs 24 passive poe

thanks for the prompt reply i though the default setting of poe (poe+) compatible to merakis indoor 12v ap

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Re: need to understand about poe+ vs 24 passive poe

Post a link to the specs for that Meraki AP.  If you don't understand how PoE works, you should not guess.

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Re: need to understand about poe+ vs 24 passive poe

hello

 

this is the meraki model i have https://meraki.cisco.com/lib/pdf/meraki_datasheet_MR18.pdf Screen Shot 2015-08-22 at 10.56.47 PM.png

Ancient Member
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Re: need to understand about poe+ vs 24 passive poe

As I suspected, it is NOT 12V PoE.

SuperUser
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Re: need to understand about poe+ vs 24 passive poe

Doh, not another PoE thread.

UK Comms & Links Engineer.


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Member
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Re: need to understand about poe+ vs 24 passive poe

[ Edited ]

hello

 

i was try to plug as suicide mode Man Happy the meraki power up almost 1 hour and didnt burn i touch the back panel it seems normal tomorrow i will replug again and post the poe status voltage, wattage in here

Ancient Member
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Re: need to understand about poe+ vs 24 passive poe

Well... when a device purports to be 802.3af compatible, that usually is the most idiot-proof mode to use indoors.  Outdoors might be a different matter when surge protectors or water in the cable become a factor.